Place the beets in a medium saucepan and cover with water by about an inch. Bring to a boil on high heat then lower the heat and maintain a simmer for 35 to 45 minutes, depending on the size of the beets, until they are easily pierced with the tines of a fork.
Rub the beets with olive oil and wrap them in foil (you can wrap them all together, no need to wrap them individually). Roast in a 400°F oven for an hour or until they are easily pierced with a fork. Let them cool to the touch.